:root{
    --black:#222222;
    --white:#ddd;
    --gray:#ececec;
    --blue:#3498DB;
    --blue-white:#96d5ff;
    --empty:rgba(0,0,0,0);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 65%;
    margin: 0 auto;
    padding-top: 2%;
    /* margin: 0 auto; */
    /* padding: 20px; */ 
    background-color: var(--black);
    color: var(--gray);
}
.container {
    /* background: white;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 30px;
    margin-top: 30px; */
    padding: 30px;
}
.title {
    /* text-align: center; */
    color: #aecbe8;
    margin-top: -10px;
    /* margin-left: 20px; */
    /* margin-bottom: 30px; */
}
.subtitle{
    color: #a0a0a0;
    margin-top: -10px;
}
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}
#searchInput {
    flex: 1;
    padding: 12px 15px;
    background-color: var(--empty);
    color: var(--gray);
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}
#searchInput:focus {
    border-color: var(--blue-white);
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}
.search_button {
    background:var(--blue);
    color: #FFF;
    border: none;
    padding: 12px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background 0.3s;
}
.search_button:hover {
    background: var(--blue-white);
}
/* #results { */
    /* min-height: 200px; */
    /* height: 100%;
    border: 2px solid #ddd;
    border-radius: 6px;
    padding: 20px;
    background: rgba(0,0,0,0); */
/* } */
.result-item {
    padding: 0px;
    /* border-bottom: 1px solid #eee; */
}
/* .result-item:last-child {
    border-bottom: none;
} */
.no-results {
    text-align: center;
    color: var(--gray);
    /* padding: 30px; */
    font-style: italic;
    /* height: 100%; */
    border: 2px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    background: var(--empty);
}
.highlight {
    background-color: #fff3d0;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: bold;
}
.error {
    color: #e74c3c;
    text-align: center;
    color: var(--white);
    padding: 20px;
}

.problembox{
    border: 2px solid var(--white);
    border-radius: 5px;
    padding: 20px;
    padding-bottom: 10px !important;
    background: var(--empty);
    margin-bottom: 18px;
}
.ansbox{
    border: 2px solid var(--white);
    max-height: 50px;
    border-radius: 5px;
    padding: 20px;
    padding-bottom: 10px !important;
    background: var(--empty);
    margin-bottom: 18px;
    transition: 1.2s;
}
.bigansbox{
    max-height: 500px !important;
}

.difftag{
    border-radius: 5px;
    font-weight: bold;
    padding: 3px;
    color: #FFF !important;
    text-decoration: none !important;
}

.hintbtn{
    color: #FFF;
    padding: 6px 20px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background 0.3s;
    border-radius: 5px;
    border: 2px solid var(--blue);
    background: var(--empty);
}
.hintbtn:hover{
    background: #3498db18;
}
.hintbtndown{background: var(--blue) !important;}

#hintext1{transition: opacity 0.3s;opacity: 0;}
#hintext2{transition: opacity 0.3s;opacity: 0;}
#hintext3{transition: opacity 0.3s;opacity: 0;}
#hintext4{transition: opacity 0.3s;opacity: 0;}
#hintext5{transition: opacity 0.3s;opacity: 0;}

.transhint{ opacity: 1 !important; }



.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    width: 30%;
    /* height: 40%; */
    background: #222222be;
    border: 2px solid var(--blue-white);
    padding: 20px;
    border-radius: 5px;
    text-align: center;
}
.modal-button{
    background:var(--empty);
    color: #FFF;
    border: none;
    padding: 6px 18px;
    border: 2px solid var(--blue);
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background 0.3s;
}
.modal-button:hover{
    background:var(--blue);
}